US PATENT SUBCLASS 65 / 393
.~.~ Hollow optical fibers or waveguides

Current as of: June, 1999
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65 /   HD   GLASS MANUFACTURING

376  DF  PROCESSES OF MANUFACTURING FIBERS, FILAMENTS, OR PREFORMS {18}
385  DF  .~ Process of manufacturing optical fibers, waveguides, or preforms thereof {29}
393.~.~ Hollow optical fibers or waveguides

DEFINITION

Classification: 65/393

Hollow optical fibers or waveguides:

(under subclass 385) Processes wherein the optical fiber or waveguide produced has an empty space or cavity.

(1) Note. Only processes for making hollow optical fibers and waveguides which are the final product and not preforms are classified here.